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Four novel Ln-bpdc coordination polymers [Ln(bpdc)(NO 3 )(DMA) 2 ] [Ln = La( 1 ), Pr( 2 ), Sm( 3 ), Eu( 4 )] [Ln = lanthanide, H 2 bpdc = 4,4-biphenyldicarboxylate acid and DMA = dimethylacetamide] have been solvothermally synthesized and structurally characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction. 1 – 4 crystallize in the monoclinic space group P 2 1 / c and show a 2-D layer constructed from 1-D Ln–organic chain and tetradentate bpdc 2 − ligand. The magnetic behavior of 2 – 4 has been investigated. The solid-state photoluminescent measurement illustrates that Eu( 4 ) displays the strong fluorescent emissions, which demonstrate that π -rich aromatic organic bpdc 2 − ligands can efficiently transfer energy to the Eu III ions. In addition, thermogravimetric analysis of Pr( 2 ) is also described. [ABSTRACT FROM AUTHOR]

A novel one-dimensional cadmium (II) coordination polymer [Cd(HL) 2 (μ-Cl) 2 ] n (1) (HL = 4-cyanopyrazole) was obtained using a slow evaporation skill at room temperature and characterized by single crystal X-ray diffraction analysis, powder X-ray diffraction (PXRD), elemental analysis, infrared spectroscopy (IR) and thermogravimetric analysis (TGA). The data of the single X-ray diffraction displayed that 1 crystallized in the triclinic system, P -1 space group. In the solid state, two HL acted as terminal ligands, bound to Cd(II) center formed [Cd(HL) 2 ]2+ unit, which was then linked by two Cl− anions to generate a straight one-dimensional chain structure. Then, a two-dimensional layer structure was obtained by wide-ranging N-H⋯Cl intermolecular hydrogen bonds. Moreover, the solid state fluorescent property of the polymer was examined and compared with the ligand. Additionally, Hirshfeld surface analysis of the polymer 1 was further investigated for the intermolecular interactions. The result indicated that the main intermolecular contact was N⋯H/H⋯N interaction with the proportion of 24.8% in the 2D fingerprint plot. Significantly, the polymer 1 proved excellent electrochemiluminescence (ECL) property in PBS solution. A novel one-dimensional cadmium (II) coordination polymer [Cd(HL) 2 (μ-Cl) 2 ] n (1) (HL = 4-cyanopyrazole) was obtained using a slow evaporation skill at room temperature and characterized. The electrochemiluminescence (ECL) property of 1 was investigated. Unlabelled Image • A novel Cd-based polymer with 4-cyanopyrazole was synthesized. • The single crystal of the Cd-based polymer was obtained and characterized adequately. • The intermolecular interactions of the Cd-based polymer were investigated by Hirshfeld surfaces analysis. • The electrochemiluminescence property of the Cd-based polymer was explored. [ABSTRACT FROM AUTHOR]

Abstract: Three novel Zn(II) complexes based on tetrazole-1-acetic ligand, Zn(1-tza)2(phen) (1), [Zn(1-tza)(2,2′-bipy)(H2O)]∙X (X=NO3 − 2, ClO4 − 3) (1-tza=tetrazole 1-acetic, phen=1,10-phenanthroline, 2,2′-bipy=2,2′-bipyridine), were synthesized and structurally characterized by single-crystal X-ray diffraction. Three different coordination modes of 1-tza ligand exist in the three obtained complexes. The 1-D chain of 1 is built by μ 2-1-tza bridges. Compounds 2 and 3 are isomorphous, and their structures show a 2-D (4,4)-connected net constructed from binuclear [Zn2(COO)2] unit and μ 3-1-tza linkers. Photoluminescence studies show that 1, 2 and 3 exhibit strong luminescence. The thermal analyses of the three complexes and the optical properties of 1 and 3 have also been investigated. [Copyright &y& Elsevier]